Force WithDefault not to be an optional value

Summary:
`WithDefault` appears not to be required to be prefixed with `?` because it's option value per se.

Fixed tests, removed `?` where needed, updated snapshots and review them. Added mechanism fro throwing error when `?WithDefault` found. Add tests for it.

Reviewed By: rubennorte

Differential Revision: D16048463

fbshipit-source-id: f55ed7454aacf0b8c42944a9b5c1037ad1b360fe

Libraries/Components/ProgressBarAndroid/ProgressBarAndroidNativeComponent.js

@@ -24,9 +24,9 @@ type NativeProps = $ReadOnly<{|
   typeAttr?: string,
   indeterminate: boolean,
   progress?: WithDefault<Float, 0>,
-  animating?: ?WithDefault<boolean, true>,
+  animating?: WithDefault<boolean, true>,
   color?: ?ColorValue,
-  testID?: ?WithDefault<string, ''>,
+  testID?: WithDefault<string, ''>,
 |}>;
 
 export default codegenNativeComponent<NativeProps>('AndroidProgressBar');